Doffing arrangement for spinning buckets



Jan. 1, 1952 J, MCDHERMQTT 2,580,571

DOFFING ARRANGEMENT FOR SPINNING BUCKETS Filed June '7. 1949 N INVENTOR.

HENRY d; McDERMOTT A TTORNE Y Patented Jan. 1, 1952 DOI'I'ING ARRANGEMENT FOB SPINNING BUCKETS Henry J. McDermott, Colllngdale, Pa; assignor to American Viscose Corporation, Wilmington, DeL, corporation of Delaware Application June 7, 1949, Serial No. 87,643

Claims- (01. 57-76) This invention relates to a system for removing wound filamentary packages from centrifugal spinning buckets, such as are used for collecting freshly spun artificial filaments of regenerated cellulose or other materials.

The primary object of the present invention is to provide an arrangement to facilitate the removal of "cakes from spinning buckets and the transfer or conveying of the cake to a storage receptacle or to another stage of treatment or packaging for shipment. Other objects and advantages of the invention will be apparent from the drawing and the description thereof.

The sole figure of the drawing is a transverse section in elevation of a spinning bucket with the dofllng arrangement of the invention in position.

In general, the invention consists in providing spinning buckets with a removable bottom plate of magnetic material, such as iron or steel or any of the ferromagnetic materials including alloys of iron, nickel and cobalt and to provide the operators with a tool that is insertable through the top of the bucket and has a magnet adapted to lift the removable plate.

As shown in the drawing, the spinning bucket comprises the cylindrical wall 3, a base or bottom wall I, and the hub portion 5. It may be provided with a cover 6 which may be held in place in any suitable fashion and as shown, it rests upon a shoulder 1 formed in the rim of the bucket and a resilient rubber ring 8 fits in complementary opposed grooves 9 and III in the outer surface of the cover 6 and the inner surface of the rim. The cover has a central opening ll through which the thread-guiding funnel is adapted to be inserted for the purpose of controlling the traversing of the yarn as it is built up within the bucket. The removable bottom plate of magnetic material is designated by I! and when the spinning bucket is intended to be used in collecting wet filamentary material such as freshly spun rayon before it has been dried, the plate I! is provided with a coating is of corrosion-resistant material, such as rubber, or any of the synthetic rubbers or resins, such as the phenol-aldehyde resins available commercially under the tradename Bakelite, Vinyon (copolymers of vinyl chloride with vinyl acetate or acrylonitrile) saran (a copolymer of vinylidene chloride and vinyl chloride), rubber hydrochloride, and the like.

The drawing shows a cake I of ray or the like after it has been collected in the bucket upon the plate I! and a removable tool I5 is shown in its fully inserted position within the bucket ready to lift the plate I 2 with its charge of filamentary material ll. Although, as shown, the cover 8 is still in place, the tool may also be inserted into the bucket after the cover 8 has been removed, in which event the force exerted by the magnet need not be strong enough to overcome (in addition to the normal lifting force required by the weight of the cake-supporting assembly) the resistance of the ring 8 to compression as the cover is forced out during the lifting.

The tool I5 comprises a supporting sleeve l8 which carries at one end a magnet I] and is formed at the other end into a knob l8 to facili tate grasping in the hand. A member, such as a central rod or shaft I9 is slidably mounted with respect to the support l8 and may have its upper end formed into a knob of sufficient size to prevent the rod I9 from falling completely out of the support is when the tool is lifted clear of other objects. The other end of the shaft 18 may 20 be enlarged as at 2| to prevent the support l6 from dropping off the shaft is in case the tool should be lifted by the knob 20. The enlargement 2| may consist of the head of a cap screw which threadedly engages a threaded bore within the shaft i 9. A recess 22 is preferably provided within the magnet to allow the enlargement 2| to be completely retracted within the confines of the magnet.

A ring or collar 23 may be fixedly or slidably secured to the support l6 for the purpose of centering the tool with respect to the cake to be lifted. Such ring may be omitted if it is not desired to transport the cake from the spinning bucket with the cover in place thereon. The ring 23 cooperates with the aperture ll of the cover 8 during the insertion of the tool to guide it into substantially central position relative to the cake.

The leading edges of either or both the magnet l1 and the ring 23 may be tapered as shown at 24 to facilitate the entry through the aperture ll of the cover. The collar 23 may be provided with a flange 25 adapted to bear against the top of the cover 6." This flange may be omitted when the collar 23 is fixedly mounted on the support I 6. when collar 23 is slidable on support I8 as is preferred, it rests on the magnet when not in use and the operator sets it in position on cover 6 as he begins to insert the magnet after which it serves to guide the magnet concentrically throughout the motion of insertion into the bucket.

It is preferred to make all parts of the tool other than the magnet itself of a non-magnetic material, such as fabric-reinforced Bakelite or Durez (phenol-formaldehyde resin condensate), stainless steel, and so forth so that the dislodging member I! can be shifted easily relative to the magnet.

When the tool is lifted with its load from the operator by allowing the tool to be suspended with the holder l6 extending downwardly between any two fingers with the projectingfianges of the knob 18 resting thereon. As soon as deposition of the load is desired, the operator need only exert pressure against the head. 2b with his thumb while lifting the knob It with his fingers. Alternatively, the tool may be suspended by gripping the knob l8 between the thumb and fingers of the hand and when release of the cake-supporting plate is desired, it may be efi'ected merely by drawing the fingers and thumb upwardly thereby lifting the whole tool and pressing the head 20 against the palm-of the hand.

It is to be understood that changes and variations may be made without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. In combination, a spinning bucket, a remov able bottom plate of magnetic material in the spinning bucket and having a diameter approximately the inside diameter of the bucket so that it is adapted to support filamentary windings collected therein, and a tool for removing the plate insertable into the bucket and comprising a magnet adjacent one end thereof.

2. A combination in accordance with claim 1 in which the tool comprises a support extending away from the magnet and has manual gripping means at its other end.

3. A combination in accordance with claim 1 in which the tool comprises a magnet and a member for engaging the plate, said magnet and member being relatively movable in a direction transverse of the plane of the plate.

4. A combination inaccordance with claim 1 4 in which the tool comprises a hollow support for the magnet and an axially shiitable rod extending through the support and through the magnet.

5. A combination in accordance with claim 1 in which the tool comprises a hollow sleeve for supporting the magnet at one end thereof, a rod within the sleeve movable endwise therein, said rod being enlarged at. both ends and said magnet having a recess adapted to receive the em largement at the end of the rod adjacent thereto.

6. A combination in accordance with claim 5 in which the sleeve has fixedly secured thereto a guiding collar and the bucket is provided with a cover having a central aperture through which the guiding collar is adapted to be inserted.

7. In combination, a spinning bucket, a removable bottom plate of magnetic material in the spinning bucket adapted to support filamentary windings collected therein, and a tooi for removing the plate insertable into the bucket and comprising a magnet adjacent one end thereof.

8. A tool for removing a wound package from centrifugal spinning buckets comprising a magnet having a recess, a hollow support for the magnet provided with a handle at the end away from the magnet, and an axially movable rod extending through the hollow support, said rod having an enlargement at one end adjacent the magnet adapted to be retracted into the recess of the magnet and being provided at the other end with a head having a diameter greater than the inside diameter of the hollow support.

9. A tool as defined in claim 8 in which the diameter of the head is less than the diameter pi the handle on the hollow support.

10. A tool as defined in claim 9 comprising a ring secured to the outside of the hollow member and spacedfrom the magnet.

HENRY J. McDERMO'IT.

REFERENCES CITED Thefollowing references are of record in the file of this patent: 

